Error MTA-STS policy is missing: STSFetchResult.NONE

1

I’m getting this error suddenly on all my domains.

MTA-STS policy is missing: STSFetchResult.NONE

I’ve done a

sudo mailinaboxand

it’s still showing.

Any ideas? It was fine a a week or so ago.

My TLS certs have all just renewed since the error started.

2

Are you using an external DNS? If yes, check that your DNS host has all the correct entries - see your admin page / System / External DNS.